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Satellites
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Презентация на тему Satellites
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Satellites. Satellites.
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Satellite - is an object, which has been placed into orbit by human endeavor.
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Satellites: Natural Artificial
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Natural satellites: The Moon. The Phobos and the Deimos.
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Artificial satellites. Sputnik 1. Explorer 1
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The first artificial satellite was Sputnik 1. It was launched by the Soviet Union on the 4th of October 1957.
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A few hundred satellites and thousand of unused satellites are orbiting the Earth.
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Purposes: Military observation Communication Navigation Weather forecast Researches
